G. V. AFANASIEV, YU. B. MIRONOV, E. M. PINSKY

NEW ASPECTS OF FORMATION OF SANDSTONE-TYPE URANIUM DEPOSITS

Patterns of localization and formation of sandstone-type deposits are specified on the basis of revision and analysis of extensive information, including the latest one, on world uranium provinces using paleoreconstructions. In addition to well-known classic patterns, new conceptions are proposed concerning: a) ring localization of redox fronts with stratal-rolled ore deposits in artesian basins; b) the relationship of paleovalley deposits to regional paleorift zones; c) the role of faults in emplacement of ore deposits including those in oil-and-gas field frames; d) the transformation of uranium concentrations in superintrusive metasomatic halos (metasandstone type). Large uranium deposits are expected in the southern periphery of the West Siberian oil-and-gas province.

Keywords: domes, rifts, basins, redox fronts, rolls, paleovalleys, forecasts